package com.shanshui.viewpager2;

import android.os.Bundle;

import androidx.fragment.app.Fragment;

import android.text.InputFilter;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.Toast;

import java.math.BigDecimal;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link BlankFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class BlankFragment extends Fragment {
    private static final String TAG = "BlankFragment";
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    public BlankFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment BlankFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static BlankFragment newInstance(String param1, String param2) {
        BlankFragment fragment = new BlankFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        Log.e(TAG, "onCreateView: ");
        View inflate = inflater.inflate(R.layout.fragment_blank, container, false);
        EditText viewById = inflate.findViewById(R.id.editTextTextPersonName);
        viewById.setFilters(new InputFilter[]{new NumberLimitFilter(0, 10000)});
        viewById.postDelayed(new Runnable() {
            @Override
            public void run() {
                Log.e(TAG, "run: " + viewById.getText().toString());
                viewById.postDelayed(this::run, 2000);
            }
        }, 2000);
        return inflate;
    }

    /**
     * 限制数字类型输入范围
     */
    public static class NumberLimitFilter implements InputFilter {
        private BigDecimal mMinNumberLimit;
        private BigDecimal mMaxNumberLimit;

        public NumberLimitFilter(double minNumberLimit, double maxNumberLimit) {
            mMinNumberLimit = new BigDecimal(minNumberLimit);
            mMaxNumberLimit = new BigDecimal(maxNumberLimit);
        }

        @Override
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
            int len = end - start;
            if (len == 0) {
                return source;
            }
            String value = dest.toString() + source.toString();
            try {
                BigDecimal bigDecimal = new BigDecimal(value);
                if (bigDecimal.compareTo(mMinNumberLimit) < 0) {
                    //低于最小值
                    return "";
                }
                if (bigDecimal.compareTo(mMaxNumberLimit) > 0) {
                    //超过最大值
                    return "";
                }
            } catch (Exception e) {
                return "";
            }
            return null;
        }
    }
}